--- old/src/java.desktop/macosx/native/libawt_lwawt/awt/AWTEvent.m	2016-04-06 19:38:32.000000000 +0530
+++ new/src/java.desktop/macosx/native/libawt_lwawt/awt/AWTEvent.m	2016-04-06 19:38:32.000000000 +0530
@@ -282,12 +282,20 @@
         //kCGSFlagsMaskAppleLeftAlternateKey,
         //kCGSFlagsMaskAppleRightAlternateKey,
         58,
-        61,
+        0,
         java_awt_event_InputEvent_ALT_DOWN_MASK,
         java_awt_event_InputEvent_ALT_MASK,
         java_awt_event_KeyEvent_VK_ALT
     },
     {
+        NSAlternateKeyMask,
+        0,
+        61,
+        java_awt_event_InputEvent_ALT_DOWN_MASK | java_awt_event_InputEvent_ALT_GRAPH_DOWN_MASK,
+        java_awt_event_InputEvent_ALT_MASK | java_awt_event_InputEvent_ALT_GRAPH_MASK,
+        java_awt_event_KeyEvent_VK_ALT
+    },
+    {
         NSCommandKeyMask,
         //kCGSFlagsMaskAppleLeftCommandKey,
         //kCGSFlagsMaskAppleRightCommandKey,
@@ -310,6 +318,8 @@
     {0, 0, 0, 0, 0, 0}
 };
 
+static BOOL leftAltKeyPressed;
+
 /*
  * Almost all unicode characters just go from NS to Java with no translation.
  *  For the few exceptions, we handle it here with this small table.
@@ -522,14 +532,20 @@
             //} else if (changedNSFlags & cur->cgsRightMask) {
             //    *javaKeyLocation = java_awt_event_KeyEvent_KEY_LOCATION_RIGHT;
             //}
+
             if (eventKeyCode == cur->leftKeyCode) {
+                leftAltKeyPressed = YES;
                 *javaKeyLocation = java_awt_event_KeyEvent_KEY_LOCATION_LEFT;
             } else if (eventKeyCode == cur->rightKeyCode) {
                 *javaKeyLocation = java_awt_event_KeyEvent_KEY_LOCATION_RIGHT;
+            } else if (cur->nsMask == NSAlternateKeyMask) {
+                leftAltKeyPressed = NO;
+                continue;
             }
             *javaKeyType = (cur->nsMask & nsFlags) ?
-                java_awt_event_KeyEvent_KEY_PRESSED :
-                java_awt_event_KeyEvent_KEY_RELEASED;
+            java_awt_event_KeyEvent_KEY_PRESSED :
+            java_awt_event_KeyEvent_KEY_RELEASED;
+
             break;
         }
     }
@@ -545,10 +561,14 @@
 
     for (cur = nsKeyToJavaModifierTable; cur->nsMask != 0; ++cur) {
         if ((cur->nsMask & nsFlags) != 0) {
-            javaModifiers |= isExtMods? cur->javaExtMask : cur->javaMask;
+            javaModifiers |= isExtMods ? cur->javaExtMask : cur->javaMask;
+            if (cur->nsMask == NSAlternateKeyMask && leftAltKeyPressed == NO) {
+                continue;
+            }
+            break;
         }
     }
-
+    
     return javaModifiers;
 }